Capacitive sensing for washroom fixture
US9328490B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2013 |
| Grant date | May 3, 2016 |
| Priority date | — |
| Expiry date | Feb 21, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03C1/057
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A capacitive sensing system and method for a hand washing lavatory system is disclosed. The lavatory system comprises a receptacle defining a hand washing area, a fixture configured to deliver water to the receptacle, and a capacitive sensing system configured to detect the presence of a user and actuate the fixture. The capacitive sensing system comprises a first sense electrode coupled to the receptacle and configured to measure a first capacitive value, a second sense electrode coupled to the receptacle spaced apart from the first sense electrode and configured to measure a second capacitive value, and a circuit configured to control operation of the fixture in response to a change in the first capacitive value relative to the second capacitive value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.